[Imports] TMC LCL - preparing the next step

marcus.wolschon at googlemail.com marcus.wolschon at googlemail.com
Tue Nov 3 10:34:26 GMT 2009


Hello everyone.

while in the import of the German TMC-LocationCodeList
we are currently still manually importing the areas
I am currently preparing the import of roads.

TMC knows:

* areas (everything is contained in an area, thus
 while being usefull in itself this step is also
 important for validating the other steps and
 narrowing down the list of candidates in automatic
 imports)
* roads made up of
* segments made up of
* points
* intersections (lists of points representing the same location
 in different segments)


For roads I am testing an automatic import.
The relations grouping the ways of a motorway,...
will be found by their ref-number and assigned
their TMC location-code as an additional attribute.

I expect only a fraction of the roads to need
manual tagging due to missing relations.

The script will upload a wiki-table as it was done
for the areas and in each run pick table-entries still
marked "TODO" and try it's rules on them.
This way it can safely be run multiple times as
matching-rules are improved to match even more
ways of writing the ref-numbers.
(Each time things are done with as many checks
 as possible and serveral dry-runs to prevent the
 wrong relations to be tagged.)

After the roads are done we can search along the roads
and identify the intersections, motorway-crossings,
roundabouts or simply nodes that make up the points
and thus the segments more or less automatically.
(This part is not yet written, let along tested.)



So....
what do you guys think?
Any constructive comments?
Offers for help?




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